are the small sacs that are the site of gas exchange in the lungs. In addition to being an airway, the is the location of the human vocal cords. Cilia in cells along the trachea and nasal passages secrete which traps dirt and particles from the air. Air is only approximately 21% oxygen. The majority of air is . The medulla oblongata controls the contraction and relaxation of the , causing the lungs to inflate and deflate during breathing. Explain the process of breathing. Begin with inhalation and describe the route that the air takes to the lungs, and what happens when the air reaches the lungs. Include in your description the terms: mouth, nose, pharynx, larynx, trachea, bronchi, lungs, alveoli, carbon dioxide, oxygen, and capillaries
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Biology, 22.06.2019 03:30
Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?
Answers: 3
Biology, 22.06.2019 05:00
Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.
Answers: 3
Biology, 22.06.2019 07:00
In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -
Answers: 3
are the small sacs that are the site of gas exchange in the lungs. In addition to being an airway, t...
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